(:.rs

pub fn rtrim_slice_a(i: &[u8]) -> &[u8] {
    let mut len = i.len();
    while len > 0 && isspace(i[len - 1]) {
        len -= 1;
    }
    &i[..len]
}

pub fn rtrim_slice_b(mut i: &[u8]) -> &[u8] {
    let mut len = i.len();
    while len > 0 && isspace(i[len - 1]) {
        i = &i[..len - 1];
        len -= 1;
    }
    i
}

pub fn rtrim_slice_c(mut i: &[u8]) -> &[u8] {
    let mut len = i.len();
    while len > 0 && isspace(i[len - 1]) {
        len -= 1;
    }
    i = &i[..len];
    i
}